The ongoing migration to smart grid technologies will enable power utilities worldwide to operate bulk electric systems more efficiently while supporting decarbonization. Substation automation, distribution automation and a variety of new applications will revolutionize the way utilities manage and deliver electricity to customers. To truly enable the full potential of smart grids, a smarter communications infrastructure is needed to route the increasing amounts of monitoring, control and status information effectively, efficiently and on time. A converged, mission-critical wide area network (WAN) built on IP/Multiprotocol Label Switching (IP/MPLS), packet microwave, and packet optical networking technologies provides the flexibility, security, and scalability to support smart grid communication, as well as application-aware traffic management to ensure high quality of service (QoS) for critical grid applications.